Waterproof paint.



Ubl l UHQ,

COATING R PLASTIC.

M/QUG $4 5 UNITED STATES PATENT OFFICE.

RUDOLF PLUNNIS, OF BERLIN, GERMANY.

WATERPROOF PAINT.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed March 28,1907. Serial No. 365,083-

the form of an undiluted, or only very slig t y diluted,

commercial solution of about 40 degrees Baum is mixed with alkalinelye of about 40 degrees Baum, the proportions being mt 6 to 8 parts by'weight of waterglass solution and 2 to 4 parts by weight of alkaline lye.

1 5 If to this mixture E2 eral or metal pigments are added,

paints of great body are obtained, which remain for a sufficiently long time so liquid that they can be very easily laid on, this property being due to their high percentage of causti alkalies. The spreading-qualities can be increased by the addition of xarnish, eed-oil, cent. e

-. or t irpent ing-oil, preferably of about 5 per paints with these pigments are soluble in water. If, ver, there is added to the pigment about 1 5 toll? its weight of cegggg the paint is rendere not only weatherproof, but also proof against alkalies and acids.

This would scarcely be expected, in view of the presence in the vehicle of the large percentage of caustic alkalies, such as is necessary if the paints areto remain for a considerable time of suitable consistency for laying on. The paint also effectively protects articles coated with it from burning.

The improved paints are suitable for application to metals, which can be thus protected from oxidation, to wood, cementand ordinary plastering, fabric, paper, pasteboard, etc. In a state of greater consistence the paints may be employed for pasting down linoleum, etc., for cementing purposes, for covering floors, and the like.

What I do claim as my invention and desire to secure by Letters Patent, is

1. A paint, consisting of a pigment, wmggkiss in the form of a solution of about 40 dfigrees Baum, alkaline lye of about 40 degrees Baum, and cement.

2. A paint, consisting-off pigment, cement, and waterglass in the form of a substantially undiluted commercial solution of about 40 degrees Baum, and alkaline lye of about 40 degrees Baum, to the extent of substantially 20 to 40 per cent. of the water-glass solution.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RUDOLF PLoNNIs.

Witnesses:

BERNHARD Gnanr,

KARL GARZ.

Examiner. 

